index.js

console.time("London")
fetch("https://europe-west2-[project-id].cloudfunctions.net/london").then( async (res)=>{
  await console.log(res.text)
})
console.timeEnd("London")

console.time("Iowa")
fetch("https://us-central1-[project-id].cloudfunctions.net/iowa").then( async (res)=>{
  await console.log(res.text)
})
console.timeEnd("Iowa")

console.time("Hong Kong")
fetch("https://asia-east2-[project-id].cloudfunctions.net/hongkong").then( async (res)=>{
  await console.log(res.text)
})
console.timeEnd("Hong Kong")

console.time("Seoul")
fetch("https://asia-northeast3-[project-id].cloudfunctions.net/seoul").then( async (res)=>{
  await console.log(res.text)
})
console.timeEnd("Seoul")